var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var app = express();

var options = {
  dotfiles:'ignore',
  etag: false,
  extensions:['html','htm'],
  index: false,
  maxAge: '1d',
  redirect: false,
  setHeaders: function(res, path, stat){
    res.set('x-timestamp', Date.now());
  }
}

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public'), options));

// 检查是否包含 token 的中间件
app.use(function(req, res, next){
  let token = '123456789';
  var accessToken = req.query.token;
  if(accessToken === token){
    next();
  }else{
    res.send({
      errCode: 1,
      errMsg: '请求必须包含 token'
    });
  }
});

// 记录访问IP的中间件
app.use(function(req, res, next){
  let fs = require('fs');
  let ip = req.ip;
  let time = new Date().toLocaleString();
  let data = fs.readFileSync('./web.log');
  data += '访问时间：' + time + '， IP: ' + ip + '\n';
  fs.writeFileSync('./web.log', data);
  next();
});

app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
